Craig Olson <craigo_at_nas.com> wrote: > Dan Hagen makes some very good points as to the biomechanical advantages associated with proper > torso rotation as it relates to paddling efficiency. It's true that the bulk of paddling power > comes from the torso and not from the arms, however, Dan neglected to mention a couple things - > specifically: > > 1) Rotating the torso in order to look at the paddle (or beers tied onto the paddle) in the manner > that Dan describes requires that the torso be rotated past the point of maximum efficiency, > specifically 53.2 degrees from the bow. The key phrase here is "peripheral vision". By using one's peripheral vision, it is possible to track the beers visually without over-rotating. As with all advanced paddling techniques, practice makes perfect. > 2) Since Dan used a differentially corrected GPS display with "heads up" display it may be assumed > that his results may not have been adequately corrected for other system variables. The "heads up" > display is inherently faulty in that no adjustments or corrections are applied for parallax, > commonly described as "perceived error caused by improper viewing angle" and this can add more > error than all the GPS error budget items combined. Ah, flame bait! It sounds like you have bought into the standard FCC line regarding the limitations of heads-up displays in sea kayaking applications. All I can say is that the parallax issue has been shown to be a red herring. Such problems are a simple case of operator error--not an inherent flaw in the system. I could say more, but I choose not to escalate the debate. Dan Hagen *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************Received on Wed May 23 2001 - 22:56:35 PDT
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